Combined coal and gas range.



6. n. WILKINSON & A. F. H-ARTEB.'

COMBINED COM. AND' GS RANGE.

Arijucmqu man MAR. 3o..|1s. v 'Y 1,251,153'. Patented Dem-25,1917. g l'I 2 gH'E'ETVs-SHEET 1 AIs. n. WILKINSON a A.I-'. IIAIIIER.

COMBINED colIL lIIIn GASIIANGE.

APPLICATION FILED III/III". a0. IIzIIa.

1,251,153. u Patented Dee. 25,1917. 2 SHEETS-SHEET 2.

UNITED STATEs PATENT OEEIOE.

GEORGE D. WILKINSON, OE OAK PARK, AND AUGUSTUS E. IIARTER, OE CHICAGO,

ILLINOIS, ASSIGNORS TO CRIBBEN & SEXTON A CDRPORATION. OF ILLINOIS.

COMIANY, OF CHICAGO, ILLINOIS,

OOEIEINEE COAL AND GA'snANGE.

Patented Dee. 25, 1917.

Application filed March 30, 1916.3. Serial No. 87,668.'

To all whom t may concern:

Be 1t known that we, GEORGE I). W ILKIN- soN and AUGUSTUS F. HARTER,citizens ot the Unite-d States, residing, respectively, at

Oak Park and Chicago, countyoi Cook,

State of Illinois, have invented al certain new and useful Improvementin Combined Coal and Gas' Ranges, and declare the following to be afull, clear, and exact description of the same. such as will enableothers skilled in the art to which it pertains to make and use the same,reference being had to the accompanying drawings, which form fuel as-dothe best types of coal ranges and which will also operate efficientlywhen burning gas. Y

A further object of our invention is to produce a simple and novelgas-burnin@ attachment for the oven of a coal range willich will permitthe range to be transformed into 'a gas-burning apparatus by the me-react of turning On the gas and to be converted into a simple coal-burningapparatus by the mere act of shutting off the gas.

A Jfurther object of our invention is to produce a simple and novelgas-burning lheating means for an Oven which will cause the inlet Jforair and the outlet for combustion gases to be regulated automatic-allyin accordance with the amount of fuel which is being consumed.

A further object ot our invention is to produce a simple and novel iiamespreader for an oven heating burner which will serve also as one of theusual trays or supports found in the ordinary coal range.

The various features-of novelty whereby.

our invention is characterized will hereinafter be pointed out withparticularity in the claims; but, for a-full understanding of ourinvention and of its objects and advantages, reference may be had to thefollowing detailed description taken in connectionwith.

the accompanying drawings, wherein:

F1g'ure-l 1s a front elevation o'fa coal range'equipped in accordancewith the present .invent-ion,v portions being broken away to exposeparts which would otherwise ybe concealed;

Fig. 2 is a section taken approximately on` line 2-2 of Fig. 1; e Fig. 3is an end view of the range looking Fig. l; and

Fig. l is a rear view ofthe range. Referring to the drawings, lrepresents the oven of a coal range ofy any usual or suit-l toward theleft from the right hand end of able construction, below which is the ,uSualj flue or passage, 2, through which the hot combustion gases fromthecoal tire pass, and behind which is the usual vertical' outlet flue,3.

In accordance with one feature of our invention we place a burner, Il,at aboutthe middle of the bottom of the oven, providing x for thispurpose an-open ended chamber, 5, extending through the bottom wall ofthe oven, through the draft passage, 2,-.and through the bottom walloI"..the drat'tpas-l sage; the chamber. 5. being bounded byya suitableshell or wall, (i, which shuts'oif. c om-v I munication with the draft,passage'q; ,The

burner is supplied with fuel througl. a. suitable pipe, 7, fixed in anysuitable way on the under side of the bottom` wall oi' the range.

In order that the oven may appear just*V like an ordinary oven in a coalrange, while coal is being burned, and avoid loss of efiig'Y ciency, weconstruct the burner in such af way that it may be raised and lowered',the

burner seating'itself in the cha'mbenS, and

completely closing the top thereof so thatv the bottom wall of the ovenremain continuous and unobstructed, whenthe .Ovenxis being heated byburning coal, this arrangement being illustrated in Fig. l.; and theburner being raised up so as to project somewhat above the bottom wall.of the oven, as,

roo

indicated in Fig; 2, when the oven is to be'v heated by rburning gas;the parts being so` shaped that when the burnery is raised an airpassage is formed around the same sov that air to support" combustionmay be Vdrawn uplhrough the chamber 5. To secure the best results weprefer to make the 'top of the burner flat and imperforate, the

f discharge orifices, 8, extending radially out Q o'f `the same at ashort distance below the laneI of the topsurface so that when theurnerisseated the orifices will be covered.

- For the sake of simplicity and durability Awe prefer to have thesupply'pipe or conduit,

7, stationary,the inner end, 9, being bent upwardly atrthe axis of thechamber 5y andl extending l into a downwardly projecting tubular neck,10, on the burner in which it has a'comfortable sliding fit. With thisarrangement only the burner need be raised .A plypipe andenga'ges withthe under edge of theI sleeve or hub portion, 1 0, of theburner. .'Byoscillating the lever, the burner may be .Y 3.0

and lowered." For the purpose of controlling the position of the :burnerwe have provided a lever, 11, which Iis-pivoted between its ends onl theunder side'of the range as at 12, so as to 'swing about a` horizontalaxis; the supporting means for the lever being preferably a boss, 13, onthe side lof the *supply pipe .7

which`permits`the-lever to be mounted'von" its support vbefore beingplaced in position under therange.l yThe inner endrof the lever,

asfindicated'at 14, embraces or ,surrounds the 'upwardly projectingpart, 9, 'of the supcaused to rise to its working. position or bepermitted to seat itself in its lidle positlon. The'outer end 'of thelever, as well as the outer end of the supply pipe 7 projects into or'through an opening, 15, inv the'base, 16, upon which the "range properis supported. The outer end ofthe pipe, 7, is. provided with the usualvalved air opening, 17, into which projects a nozzle or nipple, 18, onthe lower end of avvertically arranged gas pipe,

19.` The pipe 19 contains a valve, 20, from A. fully open.

We provide the valve stem with a laterally projecting ar-m, 26, and tothis arm we connect the upper end of a rod Aor link, 27, the 'lo'wer endlof which is connected to the outer l end ofthe lever 11.= The result isthat whenmeans must be provided to carry them away ever the handle, 23,is turned to operate the jvalve, it 'also produces a movement of theburner, causing the burner to rise from its 'Seat wlien the 'gas isturned on and to approach its seat' and finally seat itselt` as the gasis turned oft. v

i lSince the products of combustlon from the burner are discharged intothe oven some and, to this end, we have placed in the top of the oven ashallow tlue, 30, opening `at its rear end into the main flue, 3, andprovided with inlet openings, 31, in the front end which is nearthefront end of the oven; lVhen the range is being used as a coal rangecommunication betweenthe interior of the .oven and the inain Hue, 3,should of course be interrupted and we have therefore provided a damper,32, for controlling com! munication between the rear end of the flue 30and the flue 3. The damper is xed upon the inner end of a horizontalrock shaft, 33,'

which projects out -through the side wall of the Hue 3 to the end orsideof the 'range where it is provided withla' crank, 34. Since it isdesirable that thedamper 32 be closed whenever the gas is sl1 utoi i"and the burner lowered, it is possiblel to secure the control of thevalve, the burner and the damper from the single'controlling handle bysimply providing a suitable connection between the 'damper shaft, 33,and the valve stem, 2l. the .arrangement illustrated, we haveniountedbn'the end of the range a lever, 35, having at one end a fork'orjaw, 36, engaging the crank 34, on the danllper shaft; the other end ofthe lever being connected to the arni 26 on the valve stein by means ofa link or rod, 3G. The result is that whenever the operating handle, 23,is tdrned, the controlling valve, the 'burner and the damper are shiftediny unison so that the range is and therefore, in order to avoid the useof parts which must be removed when the range isv being used as a coalrange, we have provided a plate, 40, which takes the place of one of theusual trays or detachable shelves that are employed in ovens; this platebeing preferably iniperforate throughout the main central portion andbeing cut away more or less in the 'vicinity of the four edges so thatwhen it is pnt-,red in its lowermost position as iilustrated in Figs. 1and 2 of the drawings, it lies just above the burner when the latter israised, spreading the flame and causing the products of combustion totraveltothe four lvertical walls ot the oven before they rise On theinto the main body 0f. the oven. under side of the plate,v40, we place asmall open ended tunnel, 41,`the rear end of which extends intoproximity to the burner while the front end extends into proximity tothe front end yof the. stove. When the oven door,

42, isopened, the' frontend of thetnnnejs 139 fioA exposed and when thegas is turned on some of it flows out through the tunnel and may heignited by a lighted match held at the outer end.

`When it is desired to place au pan in which something is being cookedor baked on the bottom Wall of the oven the plate, 4:0, is

simply shifted to' a higher position, yout ofposition or in anyintermediate position. lnV

the arrangement shoivn this 'device takes the form of a. ilat spring,50, secured on the rear side of the bracket or plate 22 and pressingagainst the valve stem. Any other suitable means may of course beemployed.

`While ive have illustrated and described 'with particularity a singlespecific construction embodying the 'various features of our invention,We do not desire to be limited to the exact details so illust/rated anddescribed; but intend to cover all forms and arrangements which comeWithin the definitions of our invention constituting the appendedclaims.

Ne claim:

l. ln a combined coal and gas range, an oven provided with an openingextending through one wall thereof and placing the interior of the ovenin communication with the outside atmosphere, the oven having an outletfor combustion gases, a burner movahly arranged in said opening andserving as a controlling valve therefor, a damper for 'said outlet, andmeans for shifting the burner and the damper in unison With each otherto maintain the proper relation between the air inlet and the outletforilt'lie combustion gases.

2. ln a. combined coal andv gas range, an oven having an opening throughthe beu tom thereof and a discharge outlet for combustion gases,- aburner arranged 'within said opening in the bottom of the oven andmovable from a position in which it closes the opening and' has itsupper surface flush With the top of the bottom Wall of the oven to aposition in which a portlon 'of the .burner projects into the oven, a

damper for the said discharge outlet, and means for simultaneouslyshifting said burner and said damper.

3. ln a combined coal and gas range, an oven having an opening throughthe bottom thereof and a discharge outlet for combustion gases, a,burner arranged Within said openingv in the bottom of the oven andmovahle from a position in which it closes the opening and has its uppersurface flush with the to of the bottom Wall of the oven to a positionin which a portion of the burner projects into the oven, a damper for.

the said discharge' outlet, a fuel valve; and means for simultaneouslyadjusting. the valve, the damper and the burner.'-

4. ln a combined coal and gas range, an

oven having an air inlet opening extending through one Wall thereof, aburner having a part cooperating with said opening to serve as a valvetherefor, a device for controlling the supply of fuel to the burner, andmeans for simultaneously shifting said device and said burner to controlthe flow of fuel and vary the effective area of said air inlet openingaccording to the amount of j fuel which is being delivered.

5.v ln a combined -coal and gas range, an

-oven having an opening through the bottom thereof, a gas conduitarranged underneath the ovenand havingits inner end projecting into saidopening,`a combined burner and valve for said opening having its inletend arranged to slide vertically on the adjacent end of Said conduit, anactuating lever for said combined burner and valve, a fuel valve, andmeans for simultaneously actuating said fuel valve and said lever.

6. ln a combined coal and gas range, an oven having an opening throughthe bottom thereof, a combined burner and valve in said opening, andmeans for supporting said burner and valve in a position wherein itcloses said opening er in any one of a plurality of positions in each ofWhich the burner and valve extends upwardly into the oven.

ln testimony whereof We sign this speciication.

` GERGE D. lVILKINSON. AUGUSTUS F. HARTER.

